APA (7th ed.) Citation

Verma, P. S., & Agarwal, V. K. (2000). Environmental biology (Principles of ecology). S. Chand & Company.

Chicago Style (17th ed.) Citation

Verma, P. S., and V. K. Agarwal. Environmental Biology (Principles of Ecology). New Delhi: S. Chand & Company, 2000.

MLA (9th ed.) Citation

Verma, P. S., and V. K. Agarwal. Environmental Biology (Principles of Ecology). S. Chand & Company, 2000.